# 404 Import Error Fix Summary

## Problem
Browser console showed 404 errors for TypeScript files:
- api.config.ts:1 Failed to load resource: 404
- api.client.ts:1 Failed to load resource: 404  
- health.service.ts:1 Failed to load resource: 404

## Root Cause
The tsconfig.json had `"allowImportingTsExtensions": true` which caused issues with Vite's module resolution in development mode. This flag tells TypeScript to allow .ts extensions in import statements, but when combined with Vite's bundler mode resolution, it was causing the dev server to not serve the files correctly on initial cache.

## Solution
Removed `"allowImportingTsExtensions": true` from tsconfig.json

### Changes Made:
1. Edited /home/stuart/archie-platform-v2-worktrees/stuart-architecture-security-20251125/apps/frontend/file-ingestion-ui/tsconfig.json
   - Removed line: `"allowImportingTsExtensions": true,`
   
2. Cleared build cache:
   - Deleted node_modules/.vite directory
   - Deleted dist directory

3. Restarted Vite dev server:
   - Server now running on http://localhost:3000/
   - All .ts files returning HTTP 200 status codes

## Verification
All problematic files now respond with 200:
✅ api.config.ts: 200
✅ api.client.ts: 200
✅ health.service.ts: 200

## Why This Works
The `allowImportingTsExtensions` flag is only needed when:
- Using `"noEmit": true` and you want to write imports with .ts extensions
- You're NOT using a bundler (rare case)

With Vite and `"moduleResolution": "bundler"`, this flag is:
- Unnecessary (Vite handles module resolution)
- Can cause caching issues in dev mode
- Not needed for production builds

The source files already had correct imports (without .ts extensions), so removing this flag aligns the tsconfig with the actual import patterns.

## Files Modified
- /home/stuart/archie-platform-v2-worktrees/stuart-architecture-security-20251125/apps/frontend/file-ingestion-ui/tsconfig.json

## Status
✅ FIXED - Dev server running correctly with no 404 import errors